Amateur ExtraE5C09
When using rectangular coordinates to graph the impedance of a circuit, what do the axes represent?
A
Answer
Electrical principles and calculations
Type
A
The X axis represents the resistive component, and the Y axis represents the reactive component
B
The X axis represents the reactive component, and the Y axis represents the resistive component
C
The X axis represents the phase angle, and the Y axis represents the magnitude
D
The X axis represents the magnitude, and the Y axis represents the phase angle
Answer Notes
When mapping complex impedance on a rectangular coordinate system, we use the standard complex plane. The horizontal X-axis is always used for the real component, which is the resistance in ohms.
The vertical Y-axis is used for the imaginary component, which is the reactance. Inductive reactance is plotted on the positive Y-axis (up), and capacitive reactance is plotted on the negative Y-axis (down). Phase angle and magnitude are properties of polar coordinates, making those distractors incorrect for a rectangular graph.
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What coordinate system is often used to display the phase angle of a circuit containing resistance, inductive, and/or capacitive reactance?
Next · E5C10
Which point on Figure E5-1 best represents the impedance of a series circuit consisting of a 400-ohm resistor and a 38-picofarad capacitor at 14 MHz?